
<center>
<b><font size="+2">Entering Angles</font></b>
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<ul type="square">

<li><u>Angles in radians without units are the default:</u>
<blockquote>
For an angle of 60 degrees, enter it in radians as &nbsp; <tt>pi/3</tt> &nbsp; or &nbsp; <tt>1.04719...</tt>, but <b>not 60</b><br />
By default, trig functions are evaluated in radians, so <tt>cos(pi/3) = 1/2</tt>, but <tt>cos(60) = -0.9524</tt> since it is radians.  You must convert degrees to radians before applying a trig function to an angle. 
</blockquote>
</li>

<li><u>Occasionally, units are required on angles:</u>
<blockquote>
If asked for units on an angle, enter, for example, <br />
<tt>pi/6 rad</tt> &nbsp; (including rad)<br />
<tt>30 deg</tt> &nbsp; (including deg)
</blockquote>
</li>

<li><u>Examples of constants available:</u>
<blockquote><tt>pi</tt>, &nbsp; <tt>e = e^1</tt></blockquote>
</li>

<li><u>Sometimes decimals are not allowed:</u>
<blockquote>Sometimes &nbsp; <tt>pi/6</tt> &nbsp; is allowed, but &nbsp; <tt>0.524</tt> &nbsp; is not</blockquote>
</li>

<li><u>Sometimes trig functions are not allowed:</u>
<blockquote>
Sometimes &nbsp; <tt>0.866025403784</tt> &nbsp; is allowed, but &nbsp; <tt>cos(pi/6)</tt> &nbsp; is not
</blockquote>
</li>

<li><a href="http://webwork.maa.org/wiki/Available_Functions" target="_new">Link to a list of all available functions</a></li>


</ul>

